11.69. Release 0.139

11.69. Release 0.139

Dynamic Split Concurrency

The number of running leaf splits per query is now dynamically adjusted to improve
overall cluster throughput. task.initial-splits-per-node can be used to set
the initial number of splits, and task.split-concurrency-adjustment-interval
can be used to change how frequently adjustments happen. The session properties
initial_splits_per_node and split_concurrency_adjustment_interval can
also be used.

General Changes

Fix planning bug that causes some joins to not be redistributed when
distributed-joins-enabled is true.

Fix rare leak of stage objects and tasks for queries using LIMIT.

Add experimental task.join-concurrency config which can be used to increase
concurrency for the probe side of joins.

Hive Changes

Remove cursor-based readers for ORC and DWRF file formats, as they have been
replaced by page-based readers.